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Relationships are more likely to persist when lovers
Fraternal Twins
Siblings born from the same pregnancy but developed from separate eggs fertilized by different sperm, making them genetically distinct from each other.
Identical Twins
Siblings born from the same pregnancy who share identical genetic material because they were created from the same egg and sperm.
Bipolar Disorder
A psychological disorder defined by significant shifts in mood, including periods of intense euphoria (mania or hypomania) and profound sadness (depression).
Sodium Ions
Positively charged ions of sodium, essential for the electrical signals in the nervous system and for regulating body fluids.
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